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Finding the Fourth Proportional to 101,643.88, 152,523.96 and 79,394.80

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Solution

The fourth proportional to 101,643.88, 152,523.96 and 79,394.80 is: 119,137.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,643.88 : 152,523.96 = 79,394.80 : x
  2. Step 2: Convert to fraction form
    101,643.88/152,523.96 = 79,394.80/x
  3. Step 3: Cross multiply
    101,643.88x = 152,523.96 × 79,394.80
  4. Step 4: Simplify right side
    101,643.88x = 12,109,609,299.41
  5. Step 5: Solve for x
    x = 12,109,609,299.41/101,643.88
  6. Step 6: Final answer
    x = 119,137.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.